I bought a 2001 Toyota 4Runner that had 63000 miles on it, great condition purred like a beauty, and it checked out about six months later I had put about 10000 miles on it keeping it maintained. One day got on the freeway and started getting up to speed and a loud Bang! resounds from the engine followed by fast, loud, and damaging knocking. Without any warning the engine had thrown a rod through the block and blew a hole in her oil pan. Does anyone know of any part failures for these engines or can I stick with the assumption that the truck was mistreated prior to my ownership!

 

WOW, rare I'd say. I think this is only the 2nd time I've heard of a 3.4 throwing a rod through the block but it's the 2nd in like 2 weeks or so. Sorry man.

 

https://www.yotatech.com/forums/f2/m...d-pics-185253/
https://www.yotatech.com/forums/f2/b...9-01-a-126261/
https://www.yotatech.com/forums/f2/p...advice-133099/
https://www.yotatech.com/forums/f2/9...rew-rod-41717/

 

i have never heard of it. Matter of fact--when my engine builder pulled down my motor he said all the internals looked great.....At 165K and i was running 10K Mobile1 oil changes. Didnt have to do anything to the crank and i dont think he needed to resize the rods and etc...

I think it was just a fluke--it happens sometimes.

Its like two people out of how many motors?

The motor swap is not a bad job though. Got the right stuff it can be done in a weekend easy...

 

X2 on the motor swap. grab some one to help, get another and your

you'll be back on the road in no time!

 

Weird... its extremely rare.

 

There are 3.4 motors everywhere. Throw it in and move on.

Perhaps the previous owner ran it low, Jiffy lube left the plug out...who knows.

I have thought about picking up a 3.4 motor for cheap, just for insurance.

 

Where are you at?
I got my new engine for $1060 total
a little over a week install but now that I have done it
4 days tops! search local japanese engines online and call.
if you are close to me I would definately help it's kinda nice
having an experienced installers helper!

 

Man that sucks.